Random number Definition and 70 Threads

I'm programming in Java and using the Random class and I'm not sure if it makes a difference whether I use a single accessible Random object for the whole program or if I should create multiple instances (one for each object needing it?). Are there disadvantages to using one instead of the...

Make sure it is really random. No cheating!

Homework Statement Let X be a random number from (0,1). Find the probability density function of Y = 1/X. Homework Equations The Attempt at a Solution I keep thinking this is easier than I am making it out to be, but the only places I find anything similar searching is on two...

Take for instance when you ask Mathematica 7 to generate a random number. This number can't be really random. It has to adhere to some process for picking that specific number. Does anyone know anything about the algorithm/process to this?

I am trying to generate 2 normal random distributions (x1,...,xn) (y1,...,yn) that have a predefined degree of correlation between them. The constrain is that I am trying to have the same mean and stdev for both of them.

Homework Statement Say you have two biased random number generators that will spit out the numbers 1, 2, 3. They're both biased: the first one has a distribution of (\frac{1}{2}, \frac{1}{3}, \frac{1}{6} ) and the second one has a distribution of (\frac{1}{2}, \frac{1}{2}, 0 ) . Now let's...

I am writing a program in Fortran language, in which i use a Random Number Generator (RNG) subroutine. Until now i used ran1 from " Numerical Recipes in fortran ,second edition, Page 271 ", but i think it is quite slow. While searching on the internet for a faster RNG i found a few...

Hi, Guys, I'm new to this forum, and don't have strong background in probability theory, so please bare with me if the question is too naive. Here's the question, In a problem I'm trying to model, I have a random variable (say, R), which is a sum of random number (say, N) of random variables...

http://www.popsci.com/article/2006-07/diy-esp My explanation: 1) statistical anomalies are to be expected, due to the law of big numbers. 2) they're doing post-hoc predictions: "when statistical anomaly occurs => read the news and find the event"

I'm trying to figure out this little problem. I'm trying to figure out which algorithm is being used.I know the set of numbers is being used to generate the 5 digit number. I believe a Pseudo random number generator algorithm is being used. I know the set of number are being used as the seed...

Okay, What I am trying to do is create a create a random number generator, that outputs 1 and 2 (coin toss) From what I understand, the more coin tosses (the more times I generate a random 1 or 2) the more uniform the pattern should be. EG: After generating a random 1-2 sequence, 1,000,000...

Okay, What I am trying to do is create a create a random number generator, that outputs 1 and 2 (coin toss) From what I understand, the more coin tosses (the more times I generate a random 1 or 2) the more uniform the pattern should be. EG: After generating a random 1-2 sequence, 1,000,000...

Random Number Generator, Lottery, and duplicates Hi, I'm new here and looking for a bit of help and some overall conversation on a new project I'm working on. It fundamentally surrounds an international online lottery pool where visitors can join, buy a lottery ticket and then use the power of...

I am just curious. If I have a random number generator, eventually, if I wait long enough all possible numbers should began to repeat. Or would the numbers not repeat? For example, if say the first hundred numbers were totally random 455688132547... etc. would the machine eventually repeat...

I was just shutting down my 12yr old daughters computer. I found Visual Basic running. She has programed a working random number generator. Sure she copied most of the code from the help screens. But she created the form, has a working text box, a lable displaying the results with a command...

i generate a sequence of random number in [0,9], and i need to know whether the random number is uniform or not, so i should check how many time of 1 or 2 or 3...had been generated by the generator? but my program is not work!? #include<stdio.h> #include<stdlib.h> #include<time.h> void...

Can someone help me with this question ? A random number N of dice is thrown. Let Ai be the event that N = i, and assume that P(Ai) = 1/(2)^i, i >= 1. The sum of the scores is S. Find the probability that: (a) S = 4, given N is even; (b) the largest number shown by any die is r, where S...

"'It's Earth-shattering stuff,' says Dr Roger Nelson, emeritus researcher at Princeton University in the United States, who is heading the research project behind the 'black box' phenomenon." They say this box that generates random numbers, 1 or 0, generated many more 1's just before princess...

is there a way to 'beat' a random card generator in blackjack with card counting? a very simple card counting system works by counting high cards against low ones, if i have a count of +9 (high cards likely) with 3 decks left in the shoe i divide by # of decks left and get a +3 'true...

Can somebody prove the following: A Random number which (truly) is uniformly distributed on [0 1] (or in fact any continuous random variable) is irrational with probability 1.